'True gender equality in Scotland – and elsewhere – is still some way off'

The forecast is up from $52.3 in November but the report said this "remains 44 per cent lower than our March 2014 assumption".

It added: "Oil and gas prices are lower by the end of the forecast, largely reflecting a slightly stronger pound. That reduces receipts by £0.3 billion in 2021-22."

An SNP spokesman said: “The gleeful celebration of the problems affecting the North Sea oil industry is as predictable as it is pathetic – and it speaks volumes that instead of focussing on a Tory Chancellor hell-bent on continued austerity, Labour’s first instinct is to attack the SNP.

"As for the Tories, they are on the shakiest of ground when they talk of referendum promises, given their blatant falsehoods on EU membership.

"A Tory hard Brexit is by far the biggest threat to Scotland’s economy, jobs and livelihoods, and independence must be an option to protect our vital national interests."